package operation;

public class DelOperatoion {
package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;



    public class DelOperatoion implements IOPeration{

        public void work(BookList bookList) {
            System.out.println("删除图书.....");

            System.out.println("请输入你要删除的图书的书名：");
            Scanner scanner = new Scanner(System.in);
            String bookName = scanner.nextLine();

            int currentSize = bookList.getUsedSize();
            int pos = -1;
            int i = 0;
            for (; i < currentSize; i++) {
                Book book = bookList.getBook(i);
                if(book.getName().equals(bookName)) {
                    //找到这本书了 记录下标
                    pos = i;
                    break;
                }
            }
            //
            if(i >= currentSize) {
                System.out.println("没有你要找的书！");
                return;
            }
            //开始删除了
            for (int j = pos; j < currentSize-1; j++) {
                //bookList[j] = bookList[j+1];
                Book book = bookList.getBook(j+1);
                bookList.setBook(j,book);
            }
            //修改usedSize
            bookList.setUsedSize(currentSize-1);

            bookList.setBook(currentSize-1,null);

            System.out.println("删除成功！");
        }
    }